You end up walking off away from the lake feeling refreshed after having a swim. You oddly also felt a belonging at the lake. You contemplate that idea and it becomes more and more apparent that the lake is a very homely place to you.
You eventually head back to the lake and you feel much more at home near the lake. You sit on the waters edge and look at the reflection of yourself that is in the lake. As you look at your reflection in the lake it changes and morphs and you also see something through it. Curiously, you reach for said item but you fall into the lake and pass out.
As you come to your senses, you find that you are underwater in the lake. You haven't drowned due to lack of air for some reason and further studying finds that you don't even need to breath at all. You are freaked out so you want to get out the water and in the next instant you are floating out the water and into the waters edge.
As you look back at your reflection, you can feel you body has changed as well as your clothes and you see that your reflection shows what you have become.
You became a beautiful girl. Your hair is a combination of yellow, green and blue with each eye being a different colour with your right eye being a azure blue and your left being a lime green. Your face as changed to be something that you see on a soft and friendly woman and your skin can physically be seen as captivating and soft. Your torso has gotten extremly slender while your chest has grown to become two E cup breasts that are very perky that it appears to be an invisible bra holding them up. Your waist has flared out but has stayed quite cute and modest which gives off a mature appearance. Your limbs have became quite slender but have stayed fat enough that they aren't to boney and your hands and feet gave gotten extremely delicate looking but you can feel they are actually quite strong (in fact your entire body feels like nothing could cut it) and your nails look like they are covered in nail varnish but you know they are naturally shiny. You also feel that You have a womanhood now which You can tell is slightly leaking juices. Your clothing has also changed quite considerably as well sice you now wear a translucent white vale robe with slight sleaves that does nothing to hide your womanly charms. You look like a goddess in your body and attire and you gain new memories and skill for your new job as mother nature and to watch over the world's natural balance and you gain a hatred of humanity.
What happens next...